Why did Germany's response to the British blockade cause an outrage?

Germany's response to the British blockade during World War I, particularly its use of unrestricted submarine warfare, caused outrage because it led to the sinking of civilian and neutral ships, resulting in significant loss of life. The most notable incident was the sinking of the RMS Lusitania in 1915, which killed 1,198 passengers, including 128 Americans. This aggressive tactic was viewed as a violation of international law and heightened tensions, ultimately contributing to the United States' decision to enter the war. The disregard for civilian safety and neutrality fueled anti-German sentiment and intensified global condemnation.